Senior Python Backend Developer - AI Marketing SaaS. 4 Day Week. £70-90K

Ready to build smarter, faster, AI-driven solutions that transform digital marketing? 

Want a better work-life balance with our groundbreaking 4 day week model?

We are seeking a Senior Backend Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development and working with modern data infrastructure.

At Ask BOSCO®, we're on a mission to help brands spend smarter with our award-winning predictive analytics platform.

As our Senior Backend Developer you won’t just write code - you’ll shape the future of a high-growth MarTech product, lead technical strategy, and work directly with founders, data scientists, and clients to deliver impactful, intelligent solutions. If you're excited by ownership, innovation, and the chance to make a real mark in a scaling business, this is your opportunity.

If you’re looking for a role where your voice matters, your technical brilliance is valued, and your work directly influences product growth and innovation, we’d love to hear from you.

The Role at a Glance:
Senior Backend Developer
Hybrid - Leeds HQ 1–2 Days per Week
£70,000 - £90,000 DOE
Plus Benefits: including a 4-day week – we work smarter so that we can work a shorter week. 23 days annual leave + bank holidays, health insurance, retail & leisure perks, electric car scheme.

You’ll need to feel comfortable in the company of our well-behaved office dog, Roxy.

Values & Culture: Outstanding company to work for 2024
Company: AI-powered marketing analytics platform
Pedigree: Visionary Founder. Backed by renowned tech entrepreneurs inc co-founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearly
Markets: Marketing & eCommerce Agencies. eCommerce retailers.

Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure.

At ASK BOSCO®, part of Modo25, we’re building a smarter, faster, people-first marketing tech business. We're entering a phase of accelerated growth, and you’ll be at the heart of it - helping to define how our products evolve, how our systems scale, and how we meet the growing demands of our users.

From refining our microservices architecture to launching new features that delight customers, your fingerprints will be all over our success story.
We’re on the hunt for a Senior Backend Developer with deep expertise in Python to become a driving force in our fast-growing, product-led tech company. This isn’t just another dev role - it’s a rare opportunity to play a pivotal role in shaping the future of our platform and leading the engineering charge as we scale.

You’ll work hand-in-hand with our CTO, senior leadership, and cross-functional teams to bring bold ideas to life, solve meaningful problems, and architect solutions that are as scalable as they are innovative. You’ll take ownership of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence.

What You’ll Be Doing:

You’ll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you’ll work cross-functionally to turn strategy into powerful, real-world solutions. You'll champion engineering excellence, embedding best practices, and driving innovation through clean code, collaboration, and continuous improvement.

What You’ll Bring:

•    Python
•    Automated testing
•    Build pipelines with containers, automated quality checks, etc.
•    Modern development practices and environments
•    API development with Falcon framework
•    Experience working in a pragmatic startup and managing ambiguity
•    Good understanding of authentication and authorisation (we currently use NextAuth/JWT)
•    Experience with Google Cloud Platform
•    Understanding of PostgreSQL and data modelling
•    Exposure to BigQuery would be beneficial
•    Exposure to Infrastructure as Code tools such as Terraform

At ASK BOSCO®, everybody is invited with open arms.

We believe that fostering an inclusive and fair work environment is at the heart of our mission. As an equal opportunity employer, we embrace individuals from all walks of life, irrespective of race, colour, nationality, ethnicity, religion, national origin, sexual orientation, age, marital or family status, disability, gender identity or expression or any other legally protected status. We strive for a culture that celebrates and incorporates diverse backgrounds and experiences

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